Rotary air-pump



|. H. SPENCER.

ROTARY MR PUMP- APPLICAUON FILED OCT- 8 |918. 1,350,745. Patented Aug. 24, 1920.

2 SHEETS-SHEET l.

l. H. SPENCER.

ROTARY AIR PUMP.

APPLICATION FILED QCT.B,1918.

1,350,745. Patented Aug. 24,1920.

2 SHEETS-SHEET 2.

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UNITED STATES PATENT OFFICE.

IRA. H. SPENCER, VOIE' WEST HARTFORD, CONNECTICUT, .ASSIGNOR T0 THE SPENCER TURBINE COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF CON- NEcTIcUT.

ROTARY Aria-PUMP;

specification of Letters Patent. Patented Aug. 24, 1920.

Application led October 8, 1918. Serial No. 257,365.

To all whom 'it may concern.'

Be it known that I, IRA H. "SPENCER, a citizen of the United States, and a resident of vWest Hartford, in the county of Hartford and State of Connecticut, have invented a new and improved Rotary Air- Pump, of which the following is a specification.

My invention relates to that class of devices for producing fluid currents, especially currents of air and similar fluids, and an object of my invention, among others, is to so construct a device of this class that it may be made of concrete or other plastic substances. 2 y

One form of pump embodying myinvention, and in the construction and use of which the objects herein set out, as well as others, may be attained, is illustrated in the' accompanying drawings, in which- Figure 1 is a view in central longitudinal section through a pump embodying my invention, the fan blades and divertingvanes on the opposite side of the line of section being omitted for sake of clearness.

Fig. 2 is a view in cross section, on plane denoted by dotted line 2 2 of Fig. 1, the outlet fixture, however, being shown in full.

Fig. 3 is a view, scale enlarged, of afragment of my improved pump and in section on a plane following the curve of a diverting vane.

Fig. 4 is a detail view, scale still further plane denoted by dotted line 4 4 of Fig. 3. 1

Prior to my invention, fiuid pumps of the class forming the subject matter of this invention have been made from sheet or other forms or kinds of metal, all of which are at the present time quite expensive and, moreover, very difficult to obtain, and it therefore becomes important to construct these pumps of some material that mayS be more readily obtained and at less cost. I have so constructed a pump of this kind that it may be readily made of concrete, or other plastic materials, such structure forming the subject matter of my invention as embodied in this application.

One of the approved structures is illustrated in the drawings herein in which the case is made up of several sections, a motor supporting section 5, an intermediate section 6,and an outer section 7, all of which are composed of concrete or similar plastic material.

The upper halves of the sections, in the structure herein shown, are round and the lower halves are of rectangular shape. The motor supporting section has a table or bed 8 at its lower part projecting outwardly beyond the main upper part of the section, the latter having a recess 9, above the table within which a motor 10 is partially located and secured to said table. The bed is recessed, as at 11, to reduce weight. A chamber forming hub 12 projects from the inner face of the section 5, as does also a chamber forming flange 13 that surrounds the hub, the latter being preferably somewhat longer than the former. A space between said hub and flange comprises a portion of an outlet chamber 14 that is annular in form and connects at one side, through an outlet opening 15, with a passage in an outlet fixture 16, secured in any desired manner to the outer side of the case. Said outlet opening is partially formed by a notch 17 in the flange 13, at one side thereof, the rest of said opening being formed by a similar notch in a flange to be hereinafter described" on the intermediate section 6. A central opening 18 is formed through the hub 12 through which the shaft from the motor eX- tends. Stay bolts 19 are anchored in the flange 13, as by means of heads embedded Vin the substance of the flange while being molded or otherwise formed' to shape, said bolts projecting sufficiently to receive and hold other sections of the case.

The intermediate section 6 comprises two flanges 2O and 21 projectingvi'n opposite directions at the periphery of the section from a web 23, the flange 20 forming a wall of the outlet chamber 14. A discharge passage 22 is bounded by the web 23 and the hub l 12, said web4 extending inwardly around the interior of the intermediate section and having a central opening 24 through which the motor shaft extends. The edge of said opening is beveled to form a portion of one wall of a fan chamber 25 that is located partially in the intermediate section, and partially in the motor supporting section, the latter comprising a depression 26 formed in the face of the hub 12 and beveled at its edge opp0- site the beveled part of the opening 24. A notch 40 is cut in the flange 20 opposite the notch 17 to complete the outlet opening 15.

The flange 21 comprises the outer bounding wall of a return chamber 27 for air from a preceding fan,'the web 23 forming 'one side wall of said chamber and a ring 28 partially formin the opposite side wall of said chamber. ischarge vanes 29 are located at intervals around the chamber 27, dividing it into a series of discharge passages, said vanes being curved in a well known manner, as shown in Fig. 2 of the drawings. These discharge vanes are secured in place preferably in the operation `of molding and forming the section, the side edges 30 o-f the vanes at their outer ends being embedded within the material comprisingthe section. The edges of the vanes for a distance from their inner ends are bent to form lips 31 upstanding from the plane of the vanes and resting against a supporting ring 32 confined within a recess bounded by a shoulder 33 on one face of the web 23, the shaft of the motor passing through the central opening in said ring. The lips 31 may be secured to the ring in any suitable manner, as by welding; rivets and screws are also shown in the drawings herein for fastening parts together, and it will be understood that any of these means for securing -parts together may be employed as desired.

The ring 28 is provided with a series of mortises 34 to receive tenons 35 on the edges of the vanes 29 opposite the edges 30, said edges being upturned to form lips 36 between said tenons and the inner ends of the vanes. These lips 36 rest against and are secured to a plate ring 37 comprising a portionof the wall of the return chamber 27, the edge lof the central opening through the ring abutting against the edge of a spacer 38. The ring 28 is composed of concrete and has a stable support in the construction just described and embodying the discharge vanes and plate ring 37 that is connected with the spacer 38 by a tie ring 41 secured in any suitable manner to the plate ring and to the flange 39 of the spacer, as shown in Fig. 3 of the drawings. l

The section 7 has a peripheral flange 42 resting against the edge of the flange 21 on Y the section 6, said flange forming the outer wall of a discharge chamber 43 of annular form located between said flange and the peripheral edge of the ring 28. The inner I face of the section 7 forms one wall of a discharge passage 44 extending from the fan chamber to the discharge chamber, the opposite wall of said passage being formed by the side of the ring 28. The section 7 has a recess 45 at its center forming .one

wall of a fan chamber into which an inlet opening 46 extends. rThe bolts-19 extend through the several sections, as shown in Fig. 1, said sections being secured as by nuts or other suitable fastenings.

While I have shown and described herein two fans and the necessary parts or sections of the case to constitute the fan chambers and passages, and the openings and chambers appurtenant thereto, it will be understood that any suitable number of sections maybe employed to provide for such number of fans as may be necessary for a pump of any desired capacity.

I claim:

1. A rotary air pump case comprising a number of sections of plastic material hardened, said case having fluid passages, meml bers formed of a material different from that comprising the case secured within the material composing the case and extending into said passages, a shaft supportd within the case, and a fan secured to said shaft. p

2. A rotary air pump case comprising a number of sections of plastic material hardened, said case having fluid passages, members of a different material secured within the material comprising said sections, and other members of plastic material hardened supported by said members composed of a different material.

3. A rotary air pump case comprising a section of plastic material hardened having an integral wall extending in a plane located at an angle to the axis of said section, members of a different material secured within the substance of said Icase, a member of the same plastic material hardened secured to and supported by said members of a different material, and a section of the same plastic material hardened rigidly connected with the first mentioned section to complete said case. i

4. A rotary air pump case comprising a section of plastic material hardened having an integral wall extending in a plane at an angle to the axis of said section, metallic discharge vanes secured at intervals within the substance of said section and projecting at an angle to said wall, a ring of plastic material hardened supported by said vanes, and a section of the same plastic material hardened rigidly connected with the rst mentioned section to complete the case.

5. A rotary air pump case including in its' y connected with the first mentioned section on opposite sides thereof to complete the formation of the fluid passages and chambers and also said case.

the flanges of said sections together.

A rotary air pump case comprising a section of plastic material hardened having an integral peripheral flange and an integral Web located at an angle to said flange, vanes composed of metalsecured Within` the substance ofA said sections, tenons formed on the edges of said vanes, aring of plastic material hardened receiving said tenons Within its substance, and a complemental section rigidly connected with the first mentioned section to complete said case. f*

8. A rotary air pump case comprising a section having an integral peripheral flange and an integral Web located at an angle to said flange, said Web having a shoulder, a supporting rin'g located Within the recess formed by said shoulder, metallic vanes of Y of said vanes air pump case comprising a. an integral Web located at an `posite edges of said vanes curved form secured Within the substance of said section, lips upturned from the plane and secured to said ring, land a complemental section rigidly connected With the first mentioned section to complete said case. I

9. A rotary air pump case including a section of plastic material hardened and having an integral peripheral flange and an integral web located at an angle to said flange, discharge vanes having their edges embedded Within the substance of said sections, a ring of ,plastic material hardenedhaving the opsecured Within said substance, a metallic ring, lips upon said vanes secured to said ring, and a complemental section rigidly connectedwith the first mentioned section to complete said case.

l0. A rotary air pump case comprising a section having a peripheral ange and a Web located at an angle to said flange, vanes secured to said section Within said ange and against said web, lips upstanding from said vanes, and a supporting ring located Within a recess formed on said Web and secured to said lips.

11. A rotary air pump case comprising a section having a peripheral flange and a Web located at an angle to said flange, vanes located at intervals Within said flange and secured to said section, a ring located oppo# site said Web, a plate ring secured to said ring, and lips upstanding from said vanes and secured to said plate rin IRA H. SPENQER. 

